The word mineral has several meanings, it can be used to refer to the chemically distinct solids formed by geolocical processes. Mineral can also be defined as in dietary mineral, in this context it is defined as ions which are needed for the body the function optimally. Water is a molecule which exists in a partially dissacosiated state and so technically it could be argued that water is to some degree a mineral. In reality the term dietary minerals is used to refer only to those ions required by the body in low concentrations and so water is not thought of as a mineral. The dry residue content of your mineral water is given in the labling and will provide information as to the actual mineral content of your mineral water. The mineral water itself is very weak solution of the minerals listed on the lable. There are normally many different minerals in a bottle of water and also in tap water.